Ontario Geological Survey
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MDI42E13SW00022
| Record Name(s) | Greenoaks Mine - 1947 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Developed Prospect Without Reported Reserves or Resources |
| Date Created | 1987-Oct-23 |
| Date Last Modified | 2022-Mar-23 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Copper, Silver
Township or Area: Pifher, Elmhirst
Latitude: 49° 48' 33.17" Longitude: -87° 45' 56.92"
UTM Zone: 16 Easting: 444900 Northing: 5517700 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42E13SW
Point Location Description: Minesite
Location Method: Conversion from MDI
Access Description: The property is located in Pifher and Elmhirst Townships. Travel north on Highway 801, which leaves Highway 11 approximately 23 km east of Beardmore, to the Namewaminikan (Sturgeon) River, a distance of 14 km. Continue north along Highway 801 for 6 km and turn east along a bush road, staying on the left fork, for about 1.5 km to the property.
1947: A.E. Rissanen discovered the Greenoaks Mine, consisting of the No 1, 2 3 and 4 zones. Stripping, trenching (No. 1, 2, 3 and 4 zones) and diamond drilling (22 holes totalling 448.7 m on the No. 1 zone) were completed. 1948: Greenoaks Mines Ltd. purchased 10 claims. 1953: Greenoaks purchased 5 remaining claims. Resistivity, mag and geological surveys were conducted by Geo-technical Development Co. Ltd. 1953-54: Three holes, totalling 508.1 m, were drilled to test geophysical anomalies. 1960: Greenoaks drilled 303 m. 1981: Bill Miron and 487219 Ontario Ltd. optioned the Greenoaks Mine. 1982: 1,224 tons were mined by Thyssen Mining Construction Canada Ltd. for Bill Miron. 1983: Miron optioned the property to Turner Energy and Resources Ltd. Diamond-drilling, geophysics, mapping and sampling were carried out. 1985: Bill Miron held the Greenoaks Mine. 2004: Alto Ventures Ltd. acquired the property. 2007: Alto drilled 5 DDH totalling 331 m. 2008: Alto conducted trenching and sampling. 2015: Alto Ventures took 38 till samples for proccessing at Overburden Drilling Management over the Miner Lake and Greenoaks properties. 2016: Alto Ventures carried out a surface glacial till geochemistry program.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.390 | 42E13SE0063 | 42E13SE0063 |
| 10 | 42E13SW0091 | 42E13SW0091 |
| 2.56232 | 20000013950 | 20000013950 |
| 2.57174 | 20000013871 | 20000013871 |
Province: Superior
Subprovince: Wabigoon
Terrane: Eastern Wabigoon
Belt: Onaman-Tashota
Geological Age: Archean
Dec 07, 2005 (B Nelson) - The Greenoaks Mine property is underlain by intermediate to felsic metavolcanics, including andesite, dacite, rhyolite flows, tuffs, feldspar porphyry, porphyritic rhyolite and intermediate to mafic pyroclastic rocks. The Crooked Green Creek Mine and Greenoaks Mine are hosted in the same metavolcanic unit. Flow rocks appear to predominate over pyroclastic rocks. The Elmhirst Lake Stock intrudes the metavolcanics on the east portion of the property. A hybrid metavolcanic-granitoid contact zone prevents accurate identification of specific lithologies. Gold mineralization occurs in quartz veins hosted within ductile shear zones cutting metavolcanics. Zones 2, 3 and 4 were historically considered to contain low, erratic gold values over narrow widths. The No. 1 zone consists of a main quartz vein, subsidiary parallel veins (at least 3 others), fracture fillings and mineralized porphyritic host rock. The vein contains chalcopyrite, pyrrhotite and gold mineralization. The main quartz vein, which is typically blue-black (smokey), strikes 115 degrees and dips 80 degrees S to vertical. Much of the gold is present as free gold associated with the sulphides. Disseminated pyrite-pyrrhotite zones were intersected in diamond-drill core (1953) drilled to test past conductors (exact location unknown).
| Rock Type | Rank | Composition | Texture | Relationship | Felsic lava flow-unsubdivided | 1 | Porphyritic Rhyolite | Shear Zones | Host |
|---|---|---|---|---|
| Vein | 2 | Quartz | Host | |
| Intermediate lava flow-unsubdivided | 3 | Andesite | Near | |
| Intermediate lava flow-unsubdivided | 4 | Dacite | Near | |
| Feldspar Porphyry | 5 | Feldspar | Near | |
| Quartz Diorite | 6 | Quartz Diorite | Near | |
| Diabase | 7 | Diabase | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Gold | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 4 | Pyrrhotite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| Quartz | Alteration | Silicification | 1 | Unknown | Disseminated |
Dec 07, 2005 (B Nelson) - The Northern Miner (June 15, 1947) described the No. 1 zone as being 'in the form of a fork, with the handle pointing west and two prongs diverging eastward.' Channel sampling at 1.5 m intervals on the No. 1 zone indicated a zone 41.8 m long with an average width of 1.1 m, averageing 0.776 oz/ton Au. Diamond-drilling results at 15 m depths indicated the zone to be over 41.1 m in length, with an average core length of 1.6 m and grading 0.563 oz/ton Au. Grab samples taken in 1981 returned results including 0.26 oz/ton Au and 0.09 oz/ton Au.
Mar 21, 2016 (Therese Pettigrew) - Gold mineralization occurs in quartz veins hosted within ductile shear zones cutting metavolcanics. Four zones (1-4) have been identified on claim TB35563. The No. 1 zone is the main zone. Zones 2, 3, and 4 were historically considered to contain low erratic gold values over narrow widths. The No. 1 zone consists of a main quartz vein, subsidiary parallel veins (at least 3 others), fracture fillings and mineralized porphyritic host rock. The vein, contains chalcopyrite, pyrrhotite and gold mineralization. The main quartz vein, which is typically blue-black (smokey), strikes 115 degrees and dips 80 degrees S to vertical. Much of the gold is present as free gold associated with the sulphides. Disseminated pyrite-pyrrhotite zones were intersected in diamond drill core (1953) drilled to test past conductors (exact location unknown) (OFR5630). Alto’s 2007 drill program returned the following significant results: DDH GRN07-01: 12.5 g/t Au over 0.4 m from 13.2-13.6 m; DDH GRN07-04: 2.1 g/t Au over 0.5 m from 12.0-12.5 m; GRN07-04: 7.08 g/t Au over 0.8 m from 21.9-22.7 m (Alto Ventures April 3, 2007 press release).
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| 1 | Vein |
Date: Jan 02, 1997
Geologist: B Nelson
Notes: This property was visited by the Beardmore-Geraldton Economic Geologist November 5, 1981, in June, 1982, in August, 1982, July 20, 1983, August 4, 1983, September 27, 1983, June 5, 1984, August 7, 1984, and August 28, 1984.
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1982 | 1110 |
Silver 159.12 Ounces Gold 222.77 Ounces Copper 2703 Kilograms |
OFR 5630 | Produced 1224 tons at an average grade of 0.182 oz/t Au, 0.13 oz/t Ag, and 0.254% Cu. |
Map - Sturgeon River gold area, District of Thunder Bay, Ontario
Publication Number: ARM45A Scale: 1:63,360 Date: 1998
Author: Bruce E.L., Laird H.C.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Tashota-Geraldton sheet, geological compilation series, Thunder Bay and Cochrane districts
Publication Number: M2102 Date: 1997
Author: Pye E.G., Harris F.R., Fenwick K.G., Baillie J.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Elmhirst and Rickaby townships, Thunder Bay District
Publication Number: M2373 Scale: 1:31,680 Date: 1977
Author: Mackasey W.O., Wallace H.
Publisher Name: Ontario Geological Survey
Location:
Mono - Gold occurrences, prospects, and deposits of the Beardmore-Geraldton area, districts of Thunder Bay and Cochrane
Publication Number: OFR5630 Page: 218-223 Date: 1986
Author: Mason J.K., White G.D.
Publisher Name: Ontario Geological Survey
Location:
Part - The western part of the Sturgeon River area (Sturgeon R.-Beardmore section)
Publication Number: ARV45-02.002 Page: 60-117 Date: 1998
Author: Laird H.C.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of Elmhirst and Rickaby townships, District of Thunder Bay
Publication Number: R168 Date: 1978
Author: Mackasey W.O., Wallace H.
Publisher Name: Ontario Geological Survey
Location:
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